UCC28634

ACTIVE

High power Flyback controller with PSR, peak power mode, Adj CC limit and Frequency Dither

Product details

Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Flyback Rating Catalog Features CCM, DCM, High voltage startup, Light load efficiency, Overvoltage protection, Primary-side regulated Duty cycle (max) (%) 70
Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Flyback Rating Catalog Features CCM, DCM, High voltage startup, Light load efficiency, Overvoltage protection, Primary-side regulated Duty cycle (max) (%) 70
SOIC (D) 7 29.4 mm² 4.9 x 6
  • High-Power, Primary-Side CV/CC Regulation
  • Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) Operation
  • Built-In 700-V Start-Up Current Source
  • Active X-Capacitor Discharge (UCC28630 and UCC28633)
  • Adjustable Constant-Current (CC) Mode Limiting (except for UCC28630)
  • High Gate Drive Current 1-A Source and 2-A Sink
  • Low Power Modes for <30-mW System Standby
  • Best-In-Class Light Load (10%) Efficiency >85%
  • PSR design with no opto-coupler - can meet high CM isolation & surge requirements
  • VDD OVP for independent indirect output OV under open-feedback fault conditions
  • Peak-Power Mode for Transient Overload
  • Shutdown Pin Interface for External NTC
  • Protections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin Protections
  • Frequency Dither to Ease EMI Compliance (except the UCC28632)
  • Create a Custom Design Using the UCC2863x With the WEBENCH® Power Designer
  • High-Power, Primary-Side CV/CC Regulation
  • Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) Operation
  • Built-In 700-V Start-Up Current Source
  • Active X-Capacitor Discharge (UCC28630 and UCC28633)
  • Adjustable Constant-Current (CC) Mode Limiting (except for UCC28630)
  • High Gate Drive Current 1-A Source and 2-A Sink
  • Low Power Modes for <30-mW System Standby
  • Best-In-Class Light Load (10%) Efficiency >85%
  • PSR design with no opto-coupler - can meet high CM isolation & surge requirements
  • VDD OVP for independent indirect output OV under open-feedback fault conditions
  • Peak-Power Mode for Transient Overload
  • Shutdown Pin Interface for External NTC
  • Protections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin Protections
  • Frequency Dither to Ease EMI Compliance (except the UCC28632)
  • Create a Custom Design Using the UCC2863x With the WEBENCH® Power Designer

The UCC2863x targets high-power, primary-side regulated flyback converters. The ability to operate in both CCM and DCM make the device suitable for applications with a wide power range. The peak power mode allows transient peak power delivery up to 200% of nominal rating, with only a 25% peak current increase, maximizing transformer utilization.

The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling techniques allow CCM operation, and deliver excellent output voltage regulation performance for opto-coupler-less designs at power levels of 100 W and above.

A high-voltage current source enables fast and efficient start-up. Advanced light-load modes are deployed to reduce both controller and system power consumption at no load and light load. These modes enable potential system designs to meet 30-mW no-load power for power designs up to 30 W nominal, 60 W peak.

The device has been designed for ease-of-use and incorporates many features to enable a wide range of designs. Extensive protection features are included to simplify system design.

See the Device Comparison Table for details.

The UCC2863x targets high-power, primary-side regulated flyback converters. The ability to operate in both CCM and DCM make the device suitable for applications with a wide power range. The peak power mode allows transient peak power delivery up to 200% of nominal rating, with only a 25% peak current increase, maximizing transformer utilization.

The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling techniques allow CCM operation, and deliver excellent output voltage regulation performance for opto-coupler-less designs at power levels of 100 W and above.

A high-voltage current source enables fast and efficient start-up. Advanced light-load modes are deployed to reduce both controller and system power consumption at no load and light load. These modes enable potential system designs to meet 30-mW no-load power for power designs up to 30 W nominal, 60 W peak.

The device has been designed for ease-of-use and incorporates many features to enable a wide range of designs. Extensive protection features are included to simplify system design.

See the Device Comparison Table for details.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
UCC28633 ACTIVE High power Flyback controller with PSR, peak power mode, X-Cap discharge, Adj CC limit, freq dither Adds active x-capacitor discharge

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet UCC2863x, High-Power Flyback Controller with Primary-Side Regulation and Peak-Power Mode datasheet (Rev. D) PDF | HTML 15 Dec 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

UCC28630EVM-572 — UCC28630 Evaluation Module

The Texas Instruments UCC28630EVM-572 evaluation module (EVM) is a 65W primary side regulated (PSR) flyback converter for offline applications, with 130W transient surge capability. It is intended for evaluation purposes and is not intended to be an end product.

User guide: PDF
Not available on TI.com
Calculation tool

SLUC537 UCC28630 Excel Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
UCC28630 High power Flyback controller with PSR, peak power mode, X-Cap discharge, and freq dither UCC28631 High power Flyback controller with PSR, peak power mode, and Frequency Dither UCC28632 High power Flyback controller with PSR and peak power mode UCC28633 High power Flyback controller with PSR, peak power mode, X-Cap discharge, Adj CC limit, freq dither UCC28634 High power Flyback controller with PSR, peak power mode, Adj CC limit and Frequency Dither
Calculation tool

SLUC538 UCC28630 MathCad Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
UCC28630 High power Flyback controller with PSR, peak power mode, X-Cap discharge, and freq dither UCC28631 High power Flyback controller with PSR, peak power mode, and Frequency Dither UCC28632 High power Flyback controller with PSR and peak power mode UCC28633 High power Flyback controller with PSR, peak power mode, X-Cap discharge, Adj CC limit, freq dither UCC28634 High power Flyback controller with PSR, peak power mode, Adj CC limit and Frequency Dither
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 7 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos